Linear accelerator accelerating module to suppress back-acceleration of field-emitted particles
Abstract
A method for the suppression of upstream-directed field emission in RF accelerators. The method is not restricted to a certain number of cavity cells, but requires similar operating field levels in all cavities to efficiently annihilate the once accumulated energy. Such a field balance is desirable to minimize dynamic RF losses, but not necessarily achievable in reality depending on individual cavity performance, such as early Q.sub.0-drop or quench field. The method enables a significant energy reduction for upstream-directed electrons within a relatively short distance. As a result of the suppression of upstream-directed field emission, electrons will impact surfaces at rather low energies leading to reduction of dark current and less issues with heating and damage of accelerator components as well as radiation levels including neutron generation and thus radio-activation.
- Inventors:
- Issue Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1411327
- Patent Number(s):
- 9839114
- Application Number:
- 15/260,101
- Assignee:
- JEFFERSON SCIENCE ASSOCIATES, LLC (Newport News, VA); ASML. NETHERLANDS B.V. (Veldhoven, NL)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2016 Sep 08
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS
Citation Formats
Benson, Stephen V., Marhauser, Frank, Douglas, David R., and Ament, Lucas J. P. Linear accelerator accelerating module to suppress back-acceleration of field-emitted particles. United States: N. p., 2017.
Web.
Benson, Stephen V., Marhauser, Frank, Douglas, David R., & Ament, Lucas J. P. Linear accelerator accelerating module to suppress back-acceleration of field-emitted particles. United States.
Benson, Stephen V., Marhauser, Frank, Douglas, David R., and Ament, Lucas J. P. Tue .
"Linear accelerator accelerating module to suppress back-acceleration of field-emitted particles". United States. https://www.osti.gov/servlets/purl/1411327.
@article{osti_1411327,
title = {Linear accelerator accelerating module to suppress back-acceleration of field-emitted particles},
author = {Benson, Stephen V. and Marhauser, Frank and Douglas, David R. and Ament, Lucas J. P.},
abstractNote = {A method for the suppression of upstream-directed field emission in RF accelerators. The method is not restricted to a certain number of cavity cells, but requires similar operating field levels in all cavities to efficiently annihilate the once accumulated energy. Such a field balance is desirable to minimize dynamic RF losses, but not necessarily achievable in reality depending on individual cavity performance, such as early Q.sub.0-drop or quench field. The method enables a significant energy reduction for upstream-directed electrons within a relatively short distance. As a result of the suppression of upstream-directed field emission, electrons will impact surfaces at rather low energies leading to reduction of dark current and less issues with heating and damage of accelerator components as well as radiation levels including neutron generation and thus radio-activation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {12}
}
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